Stabilizing Single Ni Adatoms on a Two-Dimensional Porous Titania Overlayer at the SrTiO3(110) Surface

Author(s)

Zhiming Wang, Xianfeng Hao, Stefan Gerhold, Petr Mares, Margareta Wagner, Roland Bliem, Karina Schulte, Michael Schmid, Cesare Franchini, Ulrike Diebold

Abstract

Nickel vapor-deposited on the SrTiO₃(110) surface was studied

using scanning tunneling microscopy, photoemission spectroscopy (PES),

and density functional theory calculations. This surface forms a (4 × 1)

reconstruction, composed of a 2-D titania structure with periodic six-

and ten-membered nanopores. Anchored at these nanopores, Ni single

adatoms are stabilized at room temperature. PES measurements show that

the Ni adatoms create an in-gap state located at 1.9 eV below the

conduction band minimum and induce an upward band bending. Both

experimental and theoretical results suggest that Ni adatoms are

positively charged. Our study produces well-dispersed single-adatom

arrays on a well-characterized oxide support, providing a model system

to investigate single-adatom catalytic and magnetic properties.

Organisation(s)

Computational Materials Physics

External organisation(s)

Technische Universität Wien, Lund University, Central European Institute of Technology (CEITEC)

Journal

The Journal of Physical Chemistry Part C (Nanomaterials and Interfaces)

Volume

118

Pages

19904-19909

No. of pages

6

ISSN

1932-7447

DOI

https://doi.org/10.1021/jp506234r

Publication date

08-2014

Peer reviewed

Yes

Austrian Fields of Science 2012

103009 Solid state physics, 103015 Condensed matter, 103025 Quantum mechanics, 103036 Theoretical physics

Keywords

Portal url

https://ucrisportal.univie.ac.at/en/publications/stabilizing-single-ni-adatoms-on-a-twodimensional-porous-titania-overlayer-at-the-srtio3110-surface(f71d0ff5-f0e0-481b-82d0-5a90766dc51b).html